EP1626657B1 - Moniteur pour patient - Google Patents

Moniteur pour patient Download PDF

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Publication number
EP1626657B1
EP1626657B1 EP04731536A EP04731536A EP1626657B1 EP 1626657 B1 EP1626657 B1 EP 1626657B1 EP 04731536 A EP04731536 A EP 04731536A EP 04731536 A EP04731536 A EP 04731536A EP 1626657 B1 EP1626657 B1 EP 1626657B1
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EP
European Patent Office
Prior art keywords
patient
monitoring device
unit
sensors
transmitter
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Expired - Lifetime
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EP04731536A
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German (de)
English (en)
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EP1626657A1 (fr
EP1626657A4 (fr
Inventor
Nejhdeh c/o Suite 15 National Inn. Centre GHEVONDIAN
Hung c/o Suite 15 National Inn. Centre NGUYEN
Richard John c/o Suite 15 National Inn. Ctr. WILLSHIRE
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AiMedics Pty Ltd
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AiMedics Pty Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6831—Straps, bands or harnesses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0531—Measuring skin impedance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/67—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4806—Sleep evaluation

Definitions

  • This invention relates to a patient monitor, which is used in such a manner to monitor certain physiological conditions of a patient, and transmit the signals relating to these physiological conditions to a receiver unit, where the signals are processed to analyse and inform the patient/carer the severity status of the physiological condition.
  • the invention relates to a non-invasive method and apparatus for determining the onset of physiological conditions, such as, hypoglycaemia, hyperglycaemia, irregular blood glucose levels (BGL) and onset of fatigue.
  • US 2002/019586 discloses a device in accordance with the preamble of claim 1.
  • a monitoring device for monitoring the physiological condition of a patient on a continuous basis, the monitoring device comprising: a transmitter unit adapted to attach to a patient so as to be in contact with the skin of a patient, the transmitter unit including: attachment means comprising a chest belt adapted to attach to or around the chest of a patient;at least three sensors mounted to the attachment means adapted to monitor a plurality of patient parameters, the sensors adapted to produce signals related to the parameters being monitored; a microcontroller to which the sensors are connected, the microcontroller being adapted to process the signals; and a wireless transmitter to which the microcontroller is connected, the wireless transmitter being adapted to transmit a processed signal related to the patient parameters monitored by the sensors; a portable receiver unit adapted to receive and process the signal received from said wireless transmitter, the portable receiver unit comprising: a wireless receiver adapted to receive the signal from the wireless transmitter; a processor adapted to process the signal; and display means for displaying data relating to the patient characterised in that: the sensors are adapted to monitor
  • the portable receiver unit will preferably include communication means for communicating with a network.
  • the receiver unit will preferably also include an input keyboard for inputting data and communicating with the receiver unit.
  • the transmitter unit preferably includes analogue electronics circuitry to pre-filter, process and prepare the signals related to the physiological conditions monitored by the sensors and interface to the microcontroller.
  • the microcontroller may be adapted to perform all required control mechanism for the transmitter unit, provide digital signal processing of the information by the pre-processed analogue circuitry and prepare these signals for wireless transmission.
  • the wireless transmitter to which the microcontroller is connected may be adapted to transmit the digitally processed signals related to the physiological conditions monitored by the sensors.
  • the chest-belt unit 2 includes an adjustable elasticated strap 3 which is adapted to engage tightly around the patient's chest using a suitable and secure fastening system 6 which is relatively easy to engage and disengage to enable the belt unit 2 to be put on and taken off without difficulty.
  • the strap unit 3 can also be adapted to fit around a child's chest in the same manner as the adult patient.
  • the belt unit 2 incorporates an electronic housing 4 located in the centre of the belt unit 2, in front of the patient.
  • the housing 4 includes, within its enclosure, a wireless transmitter, analogue electronic circuitry and a microcontroller, which will be described in more detail below.
  • a hand-held receiver unit 5 which is adapted to process signals monitored by the unit 2 and transmitted to unit 5 by the transmitter unit located within the housing 4.
  • the units 2 and 5 will be encoded to communicate only with each other.
  • the belt unit 2 embeds four sensors which have been marked as E1, E2, E3 and E4 located on the underside thereof.
  • These sensor units, E1 to E4 are in the form of skin surface electrodes and each of these sensors E1 to E4 is adapted to monitor a different patient physiological parameter.
  • the sensors E1 to E4 will measure physiological parameters such as skin impedance, ECG and segments thereof, including QT-interval and ST-segment, heart rate and the mean peak frequency of the heart rate.
  • the sensors E1 to E4 are composed of a conductive polymer based material such as polypyrrole, having low impedance and low noise characteristics. These characteristics enable the sensors to measure ECG quality signals of the patient. These electrodes will also preferably be flexible so that the belt unit 2 will fit uniformly across the chest of the patient, and the electrodes will conform to contours of the chest, thereby ensuring quality contact at all times. The elasticity of the strap 3 will be such as to ensure proper contact of the electrodes with the user's skin.
  • the electrodes E1-E4 provide the signals which interface to the front-end analogue electronics circuitry 7 in which they are processed, amplified, filtered and interface to the microcontroller ( ⁇ C) unit 8.
  • the ⁇ C unit 8 digitises the signals using an A/D (analogue-to-digital) converter and transmits the digitised signals via a wireless communication platform modulator 9 to the central receiver unit 5.
  • the received will be demodulated by a wireless receiver unit 10 and stored into the random access memory (RAM) of a central processing unit (CPU) 11.
  • a blood glucose monitoring, hypoglycaemia and other physiological conditions detection algorithm 12 will then be used to calculate and estimate the onset of these conditions.
  • the central receiver unit 5 includes a network communication port 16 with which the patient can communicate information relating to his or her physiological condition to a medical practitioner such as an endocrinologist or cardiologist.
  • FIG. 4 shows the detailed function operation of the belt unit 2.
  • the electrodes E1-E4 are multiplexed and shared to measure the physiological parameters such as the ECG and skin impedance. Hence, these electrodes are interfaced and controlled by an electrode switching circuit 17.
  • This circuit unit 17 determines which physiological parameter is to be measured and directs the signal to the appropriate monitoring circuit, i.e. either the ECG monitoring circuit 18 or skin impedance monitoring circuit 19.
  • the actual switching timetable will be pre-programmed and stored within the ⁇ C unit 8.
  • the ECG signal output from the monitoring circuit 18 is amplified, filtered within the ECG signal bandwidth of 150 Hz and interfaced to the A/D component of the ⁇ C unit 8.
  • the skin impedance circuit 19 uses a variable frequency constant-current sinusoidal signal that is directed to one of the electrodes and the resulting voltage measured represents the skin impedance of the patient.
  • the constant-current signal by the unit 19 uses a frequency range between 1 kHz and 1 MHz with a current amplitude between 10 ⁇ A and 1 mA.
  • the resulting voltage measured by the electrodes are amplified, filtered and rectified by the monitoring unit 19, and interfaced to the A/D component of the ⁇ C unit 8, represent a DC signal representing the skin impedance of the patient.
  • the monitoring circuit 19 also incorporates a gain switching circuitry which provides the amplification of skin impedance using three gain settings, i.e. gain of 1, 3 and 10.
  • the A/D circuit within the ⁇ C unit 8 digitises the physiological signals into a 12-bit digital signal and stores these signals appropriately with the memory unit of 8.
  • the belt unit 2 consists of a body contact detection circuit 21 which is used to monitor and detect the detachment of the belt unit 2 from the patient.
  • a digital output signal from this detection unit 21 is interfaced to the ⁇ C unit 8, representing the status of contact of the belt unit 2. That is, a digital signal high (“1") indicates belt unit 2 in contact with patient, a digital signal low (“0") indicates lift-off from patient.
  • the belt unit 2 also consists of a calibration circuit 20 used to calibrate the measured signals by the skin impedance circuitry 19.
  • the circuit 20 switches a known impedance source (test circuit with known resistance value) at the input to the sensors E1-E4, and measures the resulting calibration signals, via the monitoring circuit 19, and stores the signal values in the ⁇ C unit 8.
  • the circuit 19 disables the known impedance and resumes normal operations.
  • the calibration signals are then used to calculate the accuracy of the constant-current source and the measured actual skin impedance values by the following:
  • the stored digitised signals obtained by ⁇ C unit 8 from the circuit unit 18 (EGG signals), circuit unit 19 (skin impedance) and battery monitoring circuit 22 are compiled and tagged to form a 16-bit data packet 24.
  • the format of this 16-bit packet is 24 comprises of 12-bit signal data 25 together with a 3-bit identification header 26.
  • Figure 5b provides the description for each of the 3-bit ID header 26.
  • bit 000 represents a zero packet
  • bit 001 represents the skin impedance using the calibration unit 20 to obtain the SI t value
  • bit 010 represents skin impedance with zero impedance using unit 20
  • bit 011 represents measured skin impedance using gain of 1
  • bit 100 represents measured skin impedance using gain of 3
  • bit 101 represents measured skin impedance using gain of 10
  • bit 110 represents the amount of charge left in the battery of unit 2
  • bit 111 represents an ECG value.
  • the ⁇ C unit 8 further formats the 16-bit packet 24 into a long data stream sequence 27, which will be transmitted by the transmitter unit 9 and consequently received by the receiver unit 10.
  • the data stream 27 consists of five skin impedance values (SI t , SI S , SI G1 , SI G3 , SI G10 ), single battery voltage level (VBAT) followed by 'n' number of ECG values.
  • the value 'n' can be programmable by the ⁇ C unit 8, to read plurality of ECG values from 1 up to 4096 times.
  • the resulting data stream 27 is encoded into a bi-phase (Manchester code) format and transferred to the transmitter unit 9, where the encoded stream 27 is transmitted via the embedded antenna 23 within the belt unit 2.
  • the sequence of transmitting the data stream 27 via the ⁇ C unit 2 and the transmitter unit 9 is repeated up to 'N' times, where the value 'N' is programmable by the ⁇ C unit 8, to process the stream 27 up to 4096 times.
  • the resulting 'N' number of encoded data stream 27 is received by the hand-held unit 5, via the receiver antenna 28 and transferred to the wireless receiver unit 10.
  • the receiver unit 10 demodulates the bi-phase data back to the original data stream 27 and transfers and stores the resulting data to the RAM of the CPU unit 11.
  • FIG. 6 outlines the data acquisition and processing implemented within the CPU unit 11, in order to carry out all functional operations of the device and provide information relating to the onset of physiological condition of a patient.
  • the identifying data packet unit 30 breaks down the data stream 27 into the 12-bit parameter data values 25 according to the 3-bit identification header 26.
  • the ECG data packets (bit 111 of packet) is applied to an ECG digital filter processor unit 31, to detect sub-components of ECG including the QT-interval, ST-segment, heart rate and the average heart rate intervals.
  • the ECG filter unit 31 is a six part process consisting of a low-pass filter (LPF) unit 32, high-pass filter (HPF) unit 33, derivative unit 34, squaring function unit 35, moving averaging unit 36 and the QRS detection unit 37.
  • LPF low-pass filter
  • HPF high-pass filter
  • the raw ECG data is applied to the LPF unit 32, which produces a band-limited signal, filtered for signals above the cut-off frequency of 11 Hz with a processing delay of 6 samples.
  • the output data stream from unit 32 is then applied to the HPF unit 33, which filters for signals below 5 Hz cut-off frequency, with a processing delay of 16 samples.
  • the filtered data is differentiated by the derivative unit 34 (using summation of first and second derivative approach) to provide the QRS peak slope value against its entire frequency bandwidth.
  • the ECG data is applied to a squaring function unit 35 to produce all positive valued data stream and amplifies the QRS complex of the data enabling enhanced detection of the QRS peak.
  • the data stream is further filtered by the stream to a moving average window unit 36 to remove unwanted side-band signals of the stream and produce a uniform waveform feature.
  • the moving average window uses a window size of 32 data samples to produce the filtered output.
  • the final stage of the ECG filtering process is the QRS complex detection unit 37 which performs a QRS peak detection algorithm and stores the resulting values.
  • the detection unit 37 uses three continuously changing threshold levels, including PrimThresh, EcgThresh and NoiseThresh. If the filtered ECG data stream is greater than the PrimThresh then a QRS peak has been detected. The PrimThresh is updated by the combination of the EcgThresh and NoiseThresh values. If a QRS complex is detected then EcgThresh is updated, otherwise NoiseThresh is updated.
  • the data acquisition process decides whether a QRS complex has been detected using unit 38, if so then the process continues to perform heart rate, QT-interval, ST-segment and skin impedance averaging calculations.
  • the process also stores the data into the ROM of CPU unit 11 and writes results to various text files. However, if no QRS complex was detected then the process continues back to the start of data acquisition unit 29 and the process restarts.
  • the QRS detection intervals (R-R intervals) obtained by the detection unit 37 is applied to heart rate calculating unit 39 to obtain the real-time and the average heart rate values.
  • the calculating unit 39 decides whether the current R-R interval (R-R c ) falls between a lower and upper limit of the average for the 8 most recent R-R intervals (R-R avg1 ).
  • the R-R c must be within 0.8 R-R avg1 and 1.2 R-R avg1 to be accepted into the new R-R avg1 stream, otherwise R-R c is stored into a backup R-R interval average stream (R-R avg2 ) in case no QRS complex is found in 8 consecutive ECG streams.
  • the resulting QRS intervals (R-R c , R-R avg1 and R-R avg2 ) are converted to the equivalent heart rate values (HR c , HR avg1 and HR avg2 ) according to formula: (1/R-R interval) x 60.
  • the heart rate values HR c , HR avg1 and HR avg2 , along with the rate-of-change of heart rate, dHR (difference between current heart rate HR c and previous heart rate HR c_prev ) are stored in the RAM module of the CPU unit 11.
  • the data acquisition sequence following QRS detection is the calculations of the QT-interval and ST-segments of the ECG using processing units 40 and 41 respectively.
  • the QT-interval is calculated using the vector length between the start point of the QRS complex and the end of the T wave.
  • the intersection point between the final slope of the T wave and a variable threshold value marks the end of the T wave.
  • the threshold value is 0.15 of the previous T wave value.
  • the calculating unit 40 analyses the current QT-interval (QT c ) for acceptance, between the range of 0.85 and 1.15 of the average for the 8 most recent QT values, QT avg .
  • the QT-interval values, QT c , QT avg and dQT are stored in the RAM module and ROM module (as text files) of the CPU unit 11.
  • the ST-segment is calculated using the vector length between the end of the QRS complex and the start of the T wave.
  • the intersection point between the first positive of the derivative of the ECG and a variable threshold level marks the beginning of the T wave.
  • the calculating unit 41 observes the current ST-interval (ST c ) for acceptance between the range of 0.85 and 1.15 of the average for the 8 most recent ST-segment values, ST avg .
  • the ST-segment values, ST c , ST avg and dST (difference between current ST c and previous ST-interval ST c_prev ) are stored in the RAM and ROM module (as text files) of the CPU unit 11.
  • the skin impedance averaging process 42 provides a single absolute skin impedance value (SI avg ) based upon the average of all three gain settings, i.e. with gain setting of 1 (SI G1 ), gain setting of 3 (SI G3 ) and gain setting of 10 (SI G10 ).
  • SI G1 gain setting of 1
  • SI G3 gain setting of 3
  • SI G10 gain setting of 10
  • the skin impedance values SI avg , SI avg_hist and dSI are stored in the RAM and ROM module (as text files) of the CPU unit 11.
  • the completed parameter data sequence comprising of heart rate adapt set [HR c , HR avg1 , HR avg2 , dHR], QT-interval data set [QT c , QT avg , dQT], ST-segment data set [ST c , ST avg and dST] and skin impedance data set [SI avg , SI avg _ hist and dSI] is applied to the first stage of the detection algorithm unit 12 for updating and learning phase (methodology is described in detail in the prior patent application WO 02/069798 .
  • the data acquisition process is repeated through the loop, starting from processing unit 29 to the detection algorithm unit 12, until the entire data stream 27 has bee processed by the first stage algorithm unit 12 and stored within the RAM and ROM memory of the CPU unit 11.
  • the accumulated parameter data sets are applied to the second-stage of the detection algorithm 12 for the real-time detection for the onset of a physiological condition.
  • the detection algorithm 12 will output the results, via the CPU unit 12, to a display unit 14, the status and severity of the physiological condition.
  • Figure 7 shows a sample contents of information that may be displayed during an onset of a physiological condition (example data based on hypoglycaemia) on the display unit 14.
  • the main physiological condition level is displayed as unit 44, informing the user in the form of absolute units.
  • Display information 44 will also aid in administrating counter-regulatory action (by user or carer) against the onset of physiological condition.
  • administration of glucose or insulin may be undertaken to counteract the onset and recover the patient to euglycaemia.
  • information 44 may also be used in a control loop in conjunction to an automated control apparatus, such as an insulin-pump or an artificial pancreas, to automatically counter-regulate the physiological condition.
  • the display information 45 is used to inform the user/patient the status category of the physiological condition.
  • the categories may include: normal, mild hypoglycaemia, mild-severe hypoglycaemia and severe hypoglycaemia.
  • the display information 46 shows the status of the alarm activation, based on the severity of the physiological condition. There will be two states for the alarm information 46, i.e. active and inactive. When in active mode, a variable audio tone (a 'beep' usually 0.5 seconds in duration) is sent by the CPU unit 11 to the audio alarm unit 15 indicating the severity of the physiological condition. The following describes the rate of tone generated in case of hypoglycaemia:

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Claims (15)

  1. Appareil de monitorage surveillant de façon continue l'état physiologique d'un patient, l'appareil de monitorage comprenant :
    une unité émettrice accommodée pour être raccordée à un patient afin d'être en contact avec la peau d'un patient, l'unité émettrice comprenant :
    des moyens de fixation comprenant un bracelet (2) pour région précordiale apte à être fixé sur la poitrine d'un patient, ou autour de celle-ci ;
    au moins trois capteurs (E1, E2, E3, E4) montés sur les moyens de fixation, aptes à surveiller une pluralité de paramètres d'un patient, les capteurs étant agencés pour produire des signaux en rapport avec les paramètres surveillés ;
    un microcontrôleur (8) auquel les capteurs sont connectés, le microcontrôleur étant agencé pour traiter les signaux ; et
    un émetteur sans fil (9) auquel le microcontrôleur est connecté, l'émetteur sans fil étant apte à émettre un signal traité en rapport avec les paramètres du patient surveillés par les capteurs ;
    une unité réceptrice portable (5) agencée pour recevoir et pour traiter le signal reçu en provenance dudit émetteur sans fil, l'unité réceptrice portable comprenant :
    un récepteur sans fil (10) agencé pour recevoir le signal en provenance de l'émetteur sans fil ;
    un processeur (11) agencé pour traiter le signal ; et
    des moyens d'affichage (14) affichant des données ayant un rapport avec le patient,
    caractérisé en ce que :
    les capteurs comprennent des électrodes (E1, E2, E3, E4) et sont agencés de façon à contrôler au moins l'impédance de la peau, la fréquence cardiaque et l'ECG du patient, un circuit de commutation étant prévu pour commuter les électrodes (E1, E2, E3, E4) afin de mesurer un paramètre puis un autre selon une séquence de commutation préprogrammée, et en ce que l'état physiologique que l'appareil est agencé pour surveiller est un état hypoglycémique.
  2. Appareil de monitorage selon la revendication 1, caractérisé en ce que l'unité réceptrice portable comporte des moyens de communication (16) communiquant avec un réseau.
  3. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité réceptrice portable comporte un clavier d'entrée entrant des données et communiquant avec l'unité réceptrice.
  4. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité émettrice comporte des circuits électroniques analogiques destinés à effectuer un filtrage préalable, à traiter et à préparer les signaux en rapport avec les paramètres du patient surveillé par les capteurs, et à s'interfacer avec le microcontrôleur.
  5. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que le microcontrôleur est agencé pour commander l'unité émettrice, pour fournir un traitement numérique du signal des informations à l'aide des circuits analogiques de pré-traitement et pour préparer ces signaux pour une émission sans fil.
  6. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que le microcontrôleur est agencé pour délivrer en sortie des signaux traités de manière numérique en rapport avec les paramètres d'un patient surveillé par les capteurs.
  7. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que les capteurs comprennent des capteurs à électrodes placés à la surface de la peau qui sont réalisés dans un polymère conducteur souple.
  8. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité émettrice est agencée pour détecter un contact et un décollement des capteurs.
  9. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que le signal traité émis par l'unité émettrice comprend des paquets de données codés, y compris des données qui se rapportent à l'identification d'un paramètre.
  10. Appareil de monitorage selon la revendication 9, caractérisé en ce que le processeur central est agencé pour appliquer un algorithme de traitement numérique du signal aux paquets de données.
  11. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que le processeur central comprend un processeur de réseau neuronal d'apprentissage programmé avec un algorithme d'apprentissage rapide.
  12. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'état hypoglycémique est surveillé en estimant le taux de glucose dans le sang du patient.
  13. Appareil de monitorage selon la revendication 12, caractérisé en ce que l'unité réceptrice est agencée pour afficher le taux estimé de glucose dans le sang du patient.
  14. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité émettrice et l'unité réceptrice communiquent sur une pluralité de largeurs de bandes de fréquences radioélectriques.
  15. Appareil de monitorage selon l'une quelconque des revendications précédentes, caractérisé en ce que les paramètres du patient sont surveillés séquentiellement à plusieurs reprises, et en ce que le signal traité qui est émis comprend différentes composantes pour les différents paramètres surveillés.
EP04731536A 2003-05-08 2004-05-07 Moniteur pour patient Expired - Lifetime EP1626657B1 (fr)

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US8945007B2 (en) 2015-02-03
ATE442807T1 (de) 2009-10-15
EP1626657A1 (fr) 2006-02-22
CA2544952A1 (fr) 2004-11-18
AU2003902187A0 (en) 2003-05-22
NZ566149A (en) 2009-09-25
WO2004098405A1 (fr) 2004-11-18
US20070060802A1 (en) 2007-03-15
DE602004023190D1 (de) 2009-10-29
WO2004098405A8 (fr) 2004-12-23
NZ543267A (en) 2008-08-29
EP1626657A4 (fr) 2007-06-20
CA2544952C (fr) 2016-05-03

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